International Commission on Irrigation & Drainage Commission Interationale des Irrigation et du Drainage

Multilingual Technical Dictionary (MTD)
<<    Browsing page 1 of 126    >>
Term No.Term Name/Term DescriptionAction
17
Multistage sampling
A type of sampling when the sample is selected by stages, the sampling units at each stage being sub-sampled from the larger units chosen at the previous stage......
Similar Terms
23
Average error
The mean of all the errors taken without regard to sign.
Similar Terms
24
Compensating error
An error that tends to offset more or less a companion error.
Similar Terms
34
Sampling distribution
The distribution of a statistic (or set of statistics) in all possible samples chosen according to a specified sampling scheme......
Similar Terms
35
Sampling error
That part of the difference between a population value and an estimate thereof, derived from a random sample, due to fact that only a sample of value is observed; as distinct from errors due to imperfect selection, bias in response or estimation, errors of observation and recording, etc. The totality of sampling errors in all possible samples of th.....
Similar Terms
36
Law of large numbers
The larger the samples, the less will be the variability in the sample averages and probability of occurrences. The law of large numbers works by its swamping effect rather than by compensation. By the law of large numbers, the average of a large number of independent measurements will be more precise and, therefore, have more reliability than a si.....
Similar Terms
37
Orthogonal
Two variates, or two linear functions are known as orthogonal if they are statistically independent.
Similar Terms
47
Trough, or Valley
The lowest quantity or value in observations of a cyclic sequence.
Similar Terms
55
Partial duration series above a given base
A list of all events, such as, floods, occurring above a selected base, without regard to the number within a given period. In the case of floods, the selected base is usually equal to the lowest annual flood, in order to include at least one flood, each year......
Similar Terms
61
Weight
The importance of an object in relation to a set of objects to which it belongs; a numerical coefficient attached to an observation (frequently by multiplication) in order that it assumes the desired degree of importance in a function of all observations of the set......
Similar Terms
63
Pictogram
A variant of the bar chart where the bars are replaced by small schematic pictures depicting the characteristic represented by the bar, each picture denoting the magnitude of the characteristic......
Similar Terms
65
Frequency polygon
A diagram with a series of lines connecting the frequencies at the mid-intervals, these in a histogram would be the midpoints of the bar tops. The smoothed frequency curve is an idealized representation of a frequency polygon......
Similar Terms
66
Cumulative absolute (relative) frequency polygon
The polygonal line obtained by joining the points the abscissa of which is the upper limit on each class and the ordinate is either the cumulative absolute or relative frequency......
Similar Terms
68
Cumulative distribution curve, Distribution curve, or Ogive
A graphic plot of the cumulative frequencies for a particular class interval and of all lower class intervals below it (or of all upper class intervals above it) against the class interval concerned. See 864......
Similar Terms
73
Correlation diagram, or Scatter diagram
The graphical representation presenting a bivariate frequency distribution when both variables are quantitative.
Similar Terms
79
Mass diagram, Mass curve, Flow integrated curve, or Summation curve
A diagram, curve, or graph, plotted with rectangular coordinates, representing a summation (integration) of all preceding quantities up to a point. Each ordinate being equal to the sum of preceding terms in the series, with the corresponding abscissa representing elapsed time, etc. The diagram is used extensively in storage and regulation studies p.....
Similar Terms
80
Residual mass diagram or Residual mass curve
A diagram or graph plotted with rectangular coordinates, each ordinate being equal to (i) the summation of all preceding quantities up to a given point, minus (ii) the arithmetical mean of the series times the number of quantities in the series up to the given point, with the corresponding abscissa representing time, number of the item in the serie.....
Similar Terms
81
Nomograph
A diagram for the graphical solution of problems that involve formulae in two or more variables.
Similar Terms
82
Curve fitting
1 - The fitting of a mathematical curve to any statistical data, e.g. regression data or time series. 2 - The fitting of a mathematically specified frequency curve to a frequency distribution observed......
Similar Terms
84
Smoothing
The process of removing fluctuations in an ordered series to make it `smooth`, in the sense that first differences are regular, and higher order differences are small......
Similar Terms
85
Weighting
A statistical method of adjusting the results of observations by taking into consideration the fact that not all the data may be of equal reliability or importance......
Similar Terms
86
Weighting coefficient
The coefficient attached to an observation as its weight in a procedure involving weighting.
Similar Terms
94
Percentage frequency
A frequency expressed as a percentage of the total number of members.
Similar Terms
97
Percentage distribution
A frequency distribution with the total frequency equated to 100 and the individual class frequencies in proportion to that figure......
Similar Terms
99
Dimensional homogeneity
The condition of an equation when the units of length, time, and mass are identical on both sides of the equality sign.
Similar Terms
<<    Browsing page 1 of 126    >>